Metal expansion plug

Details Metal expansion plug Metal expansion plug

1973-01-04

1977-09-20

Price, William

Receptacles

Closures

Thermal releaser or actuator

220305, B65D 5112, B65D 5500

Patent

active

040491510

ABSTRACT:
A device for plugging or sealing apertures comprising a heat recoverable dished disc which has the capability to increase its radial dimension upon being heated to a temperature above the transition temperature of the metal. Sealing is accomplished by selecting a heat recoverable dished disc having a radial dimension smaller than that of the aperture to be sealed, but which is capable of increasing its radial dimension to a magnitude greater than that of the aperture. The disc is inserted into the aperture and exposed to a temperature higher than its transition temperature whereupon the disc attempts to return to its original substantially planar configuration thereby increasing in radial dimension and sealing the aperture.

REFERENCES:
patent: 1101084 (1914-06-01), McCarty
patent: 1363153 (1920-12-01), Murray
patent: 2575213 (1951-11-01), Fruth
patent: 2687228 (1954-08-01), Knocke
"Cold Treating Practice with Deepfreeze", published by Motor Products Corporation, 1946, 4 pages.

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